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T-Mobile Logo T-Mobile · IT - Software Development

Principal GenAI Software Engineer

United States, Bellevue 173500.00 - 234700.00 USD / Year · Job Posted March 05, 2026
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Job Description

This role is essential for designing, implementing, and deploying scalable software generative AI-enabled solutions that meet customer requirements and support high availability environments. It involves collaborating with engineers to develop software components using modern CI/CD and deployment practices. The role requires applying judgment to resolve complex technical issues and making recommendations for generative AI-enabled software architecture and design focusing on releasing and triaging deployed software.

Job Responsibility

  • Drive the architecture, design, and production deployment of enterprise-scale software development releases using generative AI systems
  • Design and implement modular AI agents that connect to our core systems
  • Provide technical leadership by mentoring engineers and influencing technology and policy decisions
  • Establish GenAI engineering standards, reference architectures, and guardrails
  • Develop innovative generative-AI enabled software designs and improvements
  • Produce clear technical documentation and architecture descriptions
  • Also responsible for other duties/projects as assigned by business management

Requirements

  • Bachelor's Degree plus 7 years of related work experience OR Advanced degree with 5 years of related experience
  • Acceptable areas of study include Computer Science or Engineering
  • 7-10 years Technical engineering experience
  • Communication
  • Customer Service
  • Analytics
  • Technical Writing
  • At least 18 years of age
  • Legally authorized to work in the United States

Nice to have

  • Proven track record of architecting and scaling enterprise-grade GenAI platforms (LLM orchestration, agent frameworks)
  • Experience establishing AI engineering standards, reference architectures, and governance models
  • Demonstrated ability to design composable AI systems and internal developer platforms
  • Recognized technical leader with experience influencing cross-functional strategy, mentoring senior engineers, and driving AI adoption
  • Experience with release management & CI/CD deployment best practices

What we offer

  • competitive base salary and compensation package
  • annual stock grant
  • employee stock purchase plan
  • 401(k)
  • access to free, year-round money coaches
  • medical, dental and vision insurance
  • flexible spending account
  • paid time off
  • up to 12 paid holidays
  • paid parental and family leave
  • family building benefits
  • back-up care
  • enhanced family support
  • childcare subsidy
  • tuition assistance
  • college coaching
  • short- and long-term disability
  • voluntary AD&D coverage
  • voluntary accident coverage
  • voluntary life insurance
  • voluntary disability insurance
  • voluntary long-term care insurance
  • mobile service & home internet discounts
  • pet insurance
  • access to commuter and transit programs
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